cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A064205 Numbers k such that sigma(k) + tau(k) is a prime.

Table of values

n a(n)
1 1
2 2
3 8
4 128
5 162
6 512
7 32768
8 41472
9 101250
10 125000
11 1414562
12 3748322
13 5120000
14 6837602
15 8000000
16 13530402
17 24234722
18 35701250
19 66724352
20 75031250
21 78125000
22 86093442
23 91125000
24 171532242
25 177058562
26 226759808
27 233971712
28 617831552
29 664301250
30 686128968

List of values

[1, 2, 8, 128, 162, 512, 32768, 41472, 101250, 125000, 1414562, 3748322, 5120000, 6837602, 8000000, 13530402, 24234722, 35701250, 66724352, 75031250, 78125000, 86093442, 91125000, 171532242, 177058562, 226759808, 233971712, 617831552, 664301250, 686128968]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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